Oscillating piston pump



NOV. 4 y

J. B. GARBER OSCILLATING PISTON PUMP Filed Feb.

.3923 2 Shaets-Shee'. 1

ENTOK Patented Nov. 4, 1924!.

1,514,150 um orrlcs.

JESSE B. GARBER, OF SALEM, OHIO, ASSIGNOR TO THE DEMING COMPANY, OF SALEM, OHIO, A CORPORATION OF OHIO.

OSGILLATING PISTON PUMP.

Application filed February 14, 1923.

To all whom it may concern. Be it known that I, Jnssn B. GARBER, a. citizen of the United States, residing at Salem, in the county or Oolumbiana and State of Ohio, have invented a certain new and useful Improvement in an Oscillating Piston Pump, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings. In pumps of the oscillating piston-type, the inlet and outlet valves are usually positioned on opposite sides of the piston or propeller, and comprise pivoted disc valves which are opened and closed automatically by the fluid pressure in either side of the piston. Since such discs are pivotally mounted on the valve decks, the valve seats are necessarily engaged in the sameplace during each stroke ofthe piston, and sediment or foreign substance in the fluid, tends to lodge on the seat and prevent accurate seating of the valves and consequently'reduces the efliciency of the pump. Moreover, the customary design of the inlet and outlet valve decks has prevented the interchangeability between the inlet and outlet valves. To increase the efliciency of pumps of the oscillating piston type, and at the same time to cheapen the construction, I provide valve decks which have valve seats on opposite sides of the passageways therethrough, whereby such vave decks may be reversed or interchanged and thereby bringinto service new valve seats. Thus, I obtain a pump; wherein the period of service may be substantially doubled before the valve seats are required to be reground. Moreover, my-invention contemplates in effect, the use of self-grinding valves which are caused to be actuated without the use of pivot members, guide rods and the like.

To this end, I have shown a preferred form of'carrying out my invention in the accompanying drawings, and have described the manner of carrying out the objects in detail in the following description. I In the drawings, Fig. 1 is a vertical transverse section through an oscillating piston pump embodying my invention; Figs. 2 and 3 are longitudinal sectionstaken on the correspondingly numbered lines in Fig. 1; Fig.

4 is a section taken on the line 4-4 in Fig.

3; Fig. 5 is a side elevation of the deck Serial No. 618,896.

removed from the pump; and'Fig. 6 is a bottom view of the deck shown in Fig. 5."

My invention is particularly adapted for oscillating piston pumps and accordingly I have shown such a pump as embodying a casing 10 having an inlet passage 11 and a discharge passage 12 on opposite ends thereof. The casing comprises a cylindrical conipartment having one wall, as at 13, cast integrally with the body of the casing, and the other wall comprising a removable cover plate 1 1. A shaft 15 is supported at one end by the wall 13 and at the other end by the cover plate, there being a suitable stuffing box 16 to prevent leakage from the casing. A piston or propeller 17 is rigidly mounted on the shaft within the casing and comprises the usual propeller having channels 18 and 19 through which fluid passes when the pump 1s in operation.

On opposite sides of the piston, I have shown valve decks which are disposed opposite the inlet and outlet passages respectively. These decks are similarly constructed and preferably comprise castings having a horizontal wall 20, a vertical divlding Wall '21 and side walls or plates-22 and 23 respectively.- The vertical wall extends upwardly from the horizontal wall'adjacent the mid-portion thereof, and is curved, as at 24, to bear against the hub of the piston. The ends of the horizontal wall are preferably extended downwardly and curved as at 25 and 26, to engagethe circular .wall of the casing on opposite sides'of the fluid passageways leading from the casing. The horizon-talwall is moreover provided with openings 27 and 28 the portions surrounding said'openings on opposite sides of the wall are shaped to provide valve seats 29, 30, 31 and 32 respectively. Above and below the horizontal wall and opposite the openings, I provide transverse members 33,

34, 35 and 36 which are shown as rods having the ends thereof seated in suitable openings in the side plates 22 and 23 respectively. These transverse members are removable for permitting the valves to be positioned in the respective openings in the valve decks and moreover when in position limit; the travel of the valves.

To position the decks within the casing,

I have shown an opening 40 adjacent the intersection of the vertical and horizontal walls which opening is in registration with a cooperating opening ll in'the wall 13 of the casing. The diameter of the opening ll is preferably less than the opening 40 whereby a securing member 42 may be retained in position when the cover is secured to the casing. A fluid-tight joint between the opposite sides of the decks is obtained by providing a shoulder 43 on the inside of the cover plate which enables the decks to be held in close-fittin engagement with the flat wallsof the casing.

Each valve in shown as comprising a disc 15 and a vertically disposed spider L6 which is adapted to extend through a port in the deck and to'serve as a guide for returning the disc to the valve seat. The length of the spider is sufficient to prevent the valve from being drawn away from the deck before contact is made with the transverse member which is designed to limit the travel of the valve.

As shown in Figs. 2 and 3, the'upper valve deck is identical with the lower valve deck, but the valves are positioned on opposite sides ofthe horizontal wall 20. Accordingly, if the valve seats on either deck should become worn, the lower deck may be interchanged with the upper deck whereupon the inactive valve seats in the upper deck then become active valve seats in the lower deck. Similarly, the inactive valve seats in the lower deck become the active valve seats in the upper deck. If desired, only one set of transverse members 38 and 35 may be used for each deck, inasmuch as such members can be transposed from the top to the bottom of the decks in accordance with the position of the valves.

Assuming that the various parts are assembled as shown in Figs. 2 and 3, then, when the hand lever is oscillated in the usual manner, the various valves function to admit ordischarge fluid in accordance with the direction of oscillation of the piston. When it is desired to replace the valves, the decks may be readily interchanged simply by removing the cover plate and withdrawing the decks laterally so as to remove the anchor pin 42.,

In view of the foregoing description, it will be seen that my invention contemplates construction of valve decks in an oscillating piston pump which permits the use of aself-grinding valve and also permits the interchangeability of valve decks, thus doubling the period of service for which a set of valves may be used. Moreover, the arrangement of the passageways through the decks perm ts vertical movement of the valves,ft-hus insuring 'a quick closing action and decreasing the slippage which. is inherent in the pivot form of valve.

I claim:

on opposite sides 'ofthe partition, and freely movable valves disposed within said. pas

sageways.

2. In a pump of the character described, the combination with a casing, of an oscillatable piston mounted therein, valve decks disposed on opposite sides of the piston and within the casing, each deck comprising a horizontally disposed wall and a vertically disposed partition wall, the horizontally disposed wall having passageways therein on opposite sides of the vertical wall and having valve seats on opposite ends of each passageway whereby the seats on the parti tion side of said wall are active for the lower deck, while the seats on the side opposite the partition are active'tor said upper deck.

3. In a pump of the character described, the combination with a casing, of an oscillatable piston therein, valve decks, carried by the casing on opposite sides of said pis- 7 ton, each of said decks having a valve wall and a partition wall, the decks being so positioned that the valve walls are disposed.

parallel to each other, while the partition walls are'disposed in alignment with each other, said first mentioned walls having passageways therethrough and having'valve seats on opposite sides of the passageway, and a valve associated with each passageway.

4. In a pump of the character described, the combination with a casing, of an oscillatable piston therein, valve decks disposed on opposite sides of the piston, each of said valve decks comprising a horizontal wall, a vertical wall, and connecting side walls, the horizontal wall having passageways extending therethrough on opposite sides of the vertical wall and intermediate the side walls, a vertically movable valve associated with each of said passageways, transverse members extending between the side walls for limiting the upward travel of said valves, and means for attaching said decks to the casing. Y '-j 5. In a pump ofthejcharacter described, the combination with a casing having acylindrical bore of an oscillatable piston therein, valve ,deckson opposite sides of the piston, the valve deckscontacting with concentric circumferential surfaces'ot the casing and piston and comprising metal castings posed on opposite sides of the vertical walls, valve members controlling the passageways and means associated with the valve decks for limiting the movement of the valve members.

6. In a pump of the character described, the combination with a casing having a cylindrical bore, of an oscillatable piston therein, valve decks disposed on opposite sides of the piston, the valve decks comprising metal members having vertically disposed portions dividing the casing on each side of the piston into two compartments, the valve deck members having vertically extending passageways formed on each side of the central dividing portions thereof, vertically movable valve members resting in and controlling said passageways, and means carried by the valve decks for limiting the vertical movement of said valve members.

7. In a pump of the character described, the combination of acasing having a cylindrical bore, an oscillatable piston therein,

valve deck n'iembers disposed within the bore of the casing on opposite sides of the piston the valve deck members contacting with concentric surfaces formed on the casing and piston, said valve deck members dividing the casing bore into two compartments on each side of the piston, and having vertically extending passageways establishing communication between inlet and outlet ports formed in the casing wall and vertically movable valve members disposed in the passageways and adapted to contact with seats formed around the passageways and pin members mounted in the valve decks and extending in alignment with the passageways for limiting the vertical movement of the valve members whereby they may be maintained in said vertically extending passageways.

In testimony whereof, I hereunto a'lfix my signature.

JESSE B. GARBER. 

